Assembling structure of seat or backrest of mesh chair

ABSTRACT

The seat or backrest includes a meshed fabric; a frame being of an annular shape and attached by the meshed fabric; a frame seat having fixing holes and a groove for receiving the frame; and a base having an annular carrier on a periphery thereof. The carrier is disposed with assembling holes corresponding to the fixing holes and a surrounding wall for isolating an assembling position of the frame seat. The frame presses the meshed fabric to be embedded into the frame seat so that the meshed fabric is fastened on a side of the frame seat. A plurality of fasteners separately pass through the assembling holes and the meshed fabric and are fastened into the fixing holes, so that the frame seat with the meshed fabric is secured on the base.

BACKGROUND OF THE INVENTION 1. Technical Field

The invention relates to chairs, particularly to seats or backrests of mesh chairs.

2. Related Art

The elements of a chair for supporting a user, which may be a backrest or a seat, are usually made by leather or fabric, sponge covered by the leather or fabric, and a base plate. Although they provide comfortable support, their breathability is bad. Thus, new chairs which appear in the market in recent years adopt a meshed fabric tightened on a frame to serve as a primary support. Mesh with high breathability and flexibility can provide users very good comfort.

However, fastening mesh onto a frame is not easy. Traditional nailing or sewing is hard to provide sufficient strength. Thus, junctions between a meshed fabric and a frame tend to separate. If a complicated mechanic structure is adopted, then the yield rate will be reduced and the cost will be increased.

Further, when a meshed fabric is adopted to serve as a single supporting element, especially for a seat which supports two legs of a user, the user will feel uncomfortable because the user's legs near a rigid frame.

SUMMARY OF THE INVENTION

An object of the invention is to provide an assembling structure of seat or backrest of mesh chair, which possesses high efficiency and stability in manufacture.

To accomplish the above object, the seat or backrest of the invention includes a meshed fabric; a frame being of an annular shape and attached by the meshed fabric; a frame seat having fixing holes and a groove for receiving the frame; and a base having an annular carrier on a periphery thereof. The carrier is disposed with assembling holes corresponding to the fixing holes and a surrounding wall for isolating an assembling position of the frame seat. The frame presses the meshed fabric to be embedded into the frame seat so that the meshed fabric is fastened on a side of the frame seat. A plurality of fasteners separately pass through the assembling holes and the meshed fabric and are fastened into the fixing holes, so that the frame seat with the meshed fabric is secured on the base.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a mesh chair of the invention;

FIG. 2 is an exploded view of the invention used as a seat;

FIG. 3 is a schematic view of the frame and meshed fabric of the invention;

FIG. 4 is a cross-sectional view along line 4-4 in FIG. 1;

FIG. 5 is a partially enlarged view of FIG. 4; and

FIG. 6 is a schematic view of corresponding relation between the frame seat and base of the invention.

DETAILED DESCRIPTION OF THE INVENTION

The invention provides an assembling structure of a seat 11 or backrest 10 of mesh chair 1.

Please refer to FIGS. 1-5, a seat 11 is taken as an example, which includes a base 2, a meshed fabric 3, a frame 4, a frame seat 5 and a buffer 6. Also, the invention can be applied to a backrest. The meshed fabric 3 is used to provide support to buttocks of a user. The frame 4 is attached on the meshed fabric 3 to make the meshed fabric 3 shaped into a predetermined shape. The frame seat 5 is formed with fixing holes 51 for assembling with the base 2 and an annular groove 50 for receiving the frame 4. Thus, the meshed fabric 3 can be laid on a side of the frame seat 5 and covers the frame seat 5. The base 2 corresponding to the frame seat 5 in shape is formed with an annular carrier 20 on a periphery thereof. The carrier 20 is disposed with assembling holes 21 corresponding to the fixing holes 51 and a surrounding wall 22 for isolating an assembling position of the frame seat 5. The frame seat 5 is disposed on an outside of the surrounding wall 22. In addition, a pressing flange 52 is formed atop the frame seat 5 toward the surrounding wall 22.

The buffer 6 may be made of foam such as sponge. The buffer 6 is fixed on the carrier 20. In detail, the buffer 6 is placed on a part of the base 2 inside the surrounding wall 22 in a U-shape. Each of two ends of the buffer 6 is formed with a positioning pillar 60. The base 2 is formed with positioning holes 23 corresponding to the positioning pillars 60. In assembling, the positioning pillars 60 is temporarily positioned in the positioning holes 23 in advance, then the buffer 6 is fixed on the carrier 20 by fasteners 7 such as screws. As a result, when the invention is applied to a seat 11 of a chair 1, the buffer 6 can provide flexible support to a user's legs, and when the invention is applied to a backrest of the chair 1, the buffer 6 can provide flexible support to a user's shoulders and neck. This is different from hard support of conventional mesh chairs.

In assembling, the frame 4 with the meshed fabric 3 is embedded into the groove 50 so that the meshed fabric 3 is fastened on a side of the frame seat 5 first, then the buffer 6 is fastened inside the surrounding wall 22 on the carrier, finally, the frame seat 5 with the meshed fabric 3 is placed outside the surrounding wall 22 on the carrier 20 so as to make the meshed fabric 3 covers the base 2 including the buffer 6. The fixing holes 51 separately correspond to the assembling hole 21 of the carrier 20, and a plurality of fasteners 8 such as screws separately pass through the meshed fabric 3 to be fastened into the fixing holes 51, so that the frame seat 5 with the meshed fabric 3 is secured on the base 2.

Please refer to FIG. 5. The buffer 6 is located in the front of the seat 11. The height of the buffer 6 supports the meshed fabric 3 to be slightly higher than the frame seat 5. In other words, when the frame seat 5 is fixed by fasteners 8, the pressing flange 52 presses the meshed fabric 3 on the top of the surrounding wall 22. This will make the meshed fabric 3 be tighter fixed on the base 2 with flexibility and provide better support to a user's legs.

Furthermore, when assembling the frame seat 5 and the base 2, the fixing holes 51 of the frame seat 5 are shielded by the meshed fabric 3, so the frame seat 5 and the base 2 are difficult to be correctly positioned. To prevent this, as shown in FIG. 6, the frame seat is 5 is provided with positioning members 53 toward the base 2, and the base 2 is formed with positioning recesses 24 for being separately inserted by the positioning members 53. By inserting the positioning members 53 into the positioning recesses 24, the frame seat 5 and the base 2 can be easily positioned before fastening.

Such alterations, modifications, and improvements are intended to be part of this disclosure, and are intended to be within the spirit and the scope of the present invention. Accordingly, the foregoing description is by way of example only and is not intended to be limiting. The present invention is limited only as defined in the following claims and the equivalents thereto. 

What is claimed is:
 1. A seat or backrest of a mesh chair, comprising: a meshed fabric; a frame, being of an annular shape, and attached by the meshed fabric; a frame seat, corresponding to the frame in shape, and having fixing holes and a groove for receiving the frame, wherein the frame presses the meshed fabric to be embedded into the frame seat so that the meshed fabric is fastened on a side of the frame seat; and a base, corresponding to the frame seat in shape, having an annular carrier on a periphery thereof, and the carrier being disposed with assembling holes corresponding to the fixing holes and a surrounding wall for isolating an assembling position of the frame seat; wherein the frame seat is disposed on an outside of the surrounding wall, the frame seat is provided with positioning members toward the base, the base is formed with positioning recesses for being separately inserted by the positioning members, and a plurality of fasteners separately pass through the assembling holes and the meshed fabric and are fastened into the fixing holes, so that the frame seat with the meshed fabric is secured on the base.
 2. The seat or backrest of claim 1, further comprising a buffer placed on a part of the base inside the surrounding wall to be covered by the meshed fabric, wherein a height of the buffer supports the meshed fabric to be slightly higher than the frame seat, and a pressing flange is formed atop the frame seat toward the surrounding wall.
 3. The seat or backrest of claim 2, wherein the buffer is of a U-shape, each of two ends of the buffer is formed with a positioning pillar, and the base is formed with positioning holes corresponding to the positioning pillars, the positioning pillars are separately inserted into the positioning holes, and the buffer is fixed on the carrier by fasteners.
 4. A seat or backrest of a mesh chair, comprising: a meshed fabric; a frame, being of an annular shape, and attached by the meshed fabric; a frame seat, corresponding to the frame in shape, and having fixing holes and a groove for receiving the frame, wherein the frame presses the meshed fabric to be embedded into the frame seat so that the meshed fabric is fastened on a side of the frame seat; a base, corresponding to the frame seat in shape, having an annular carrier on a periphery thereof, and the carrier being disposed with assembling holes corresponding to the fixing holes and a surrounding wall for isolating an assembling position of the frame seat; and a buffer placed on a part of the base inside the surrounding wall to be covered by the meshed fabric; wherein the frame seat is disposed on an outside of the surrounding wall, a plurality of fasteners separately pass through the assembling holes and the meshed fabric and are fastened into the fixing holes so that the frame seat with the meshed fabric is secured on the base, a height of the buffer supports the meshed fabric to be slightly higher than the frame seat, and a pressing flange is formed atop the frame seat toward the surrounding wall.
 5. The seat or backrest of claim 4, wherein the buffer is of a U-shape, each of two ends of the buffer is formed with a positioning pillar, and the base is formed with positioning holes corresponding to the positioning pillars, the positioning pillars are separately inserted into the positioning holes, and the buffer is fixed on the carrier by fasteners. 